Messier R-152S 152/760 EQ Achromatic Refractor Optical Design Achromatic Refractor Magnification 300x Front Lens  (Clear Aperture) 152mm Focal Length, Focal Ratio 760mm Standard Eyepiece(s) PL-10 / PL-15 / PL-25mm (31.7mm/1.25'') View Finder Scope 8x50